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          <h1 class="post-title" itemprop="name headline">3DES加密算法-预登记接口</h1>
        

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        <blockquote>
<p>3DES加密算法-预登记接口</p>
</blockquote>
<h4 id="背景"><a href="#背景" class="headerlink" title="背景"></a>背景</h4><p>对接第三方的预登记接口</p>
<p>一、请求地址：<a href="http://XXX.com" target="_blank" rel="noopener">http://XXX.com</a></p>
<p>二、请求参数：{‘message’:”加密后字符串”}<br>字符串加密步骤：</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="number">1</span>、加密前字符串，json格式——》&#123;<span class="string">"name"</span>:<span class="string">"telphone"</span>,<span class="string">"param"</span>:<span class="string">"手机号码"</span>&#125;</span><br><span class="line">或&#123;<span class="string">"name"</span>:<span class="string">"openid"</span>,<span class="string">"param"</span>:<span class="string">"openid号码"</span>&#125;</span><br><span class="line"><span class="number">2</span>、使用TripleDES（<span class="number">3</span>Des）加密算法，加密密钥为 <span class="number">05</span>WOB22Z9jdrHxLVjGxAL47F</span><br><span class="line"><span class="number">3</span>、将加密后的字符串进行url编码</span><br><span class="line">字符串加密例子</span><br><span class="line">原字符串:&#123;<span class="string">"name"</span>:<span class="string">"telphone"</span>,<span class="string">"param"</span>:<span class="string">"18520278383"</span>&#125;</span><br><span class="line">加密后字符串:AvR7ai1cixdbIiv1ngMwnYbmPhKKbDyi51k4GyL9y+<span class="number">3</span>tqfzd4MeFNm/vwA/AoSIn</span><br><span class="line">加密后字符串经过url编码:AvR7ai1cixdbIiv1ngMwnYbmPhKKbDyi51k4GyL9y%<span class="number">2</span>B3tqfzd4MeFNm%<span class="number">2F</span>vwA%<span class="number">2F</span>AoSIn</span><br><span class="line">解密字符串:&#123;<span class="string">"name"</span>:<span class="string">"telphone"</span>,<span class="string">"param"</span>:<span class="string">"18520278383"</span>&#125;</span><br></pre></td></tr></table></figure>
<p>按照说明，通过HTTP(S)协议，调用接口进行预登记的功能。</p>
<h4 id="代码实例"><a href="#代码实例" class="headerlink" title="代码实例"></a>代码实例</h4><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span 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class="line">239</span><br><span class="line">240</span><br><span class="line">241</span><br><span class="line">242</span><br><span class="line">243</span><br><span class="line">244</span><br><span class="line">245</span><br><span class="line">246</span><br><span class="line">247</span><br><span class="line">248</span><br><span class="line">249</span><br><span class="line">250</span><br><span class="line">251</span><br><span class="line">252</span><br><span class="line">253</span><br><span class="line">254</span><br><span class="line">255</span><br><span class="line">256</span><br><span class="line">257</span><br><span class="line">258</span><br><span class="line">259</span><br><span class="line">260</span><br><span class="line">261</span><br><span class="line">262</span><br><span class="line">263</span><br><span class="line">264</span><br><span class="line">265</span><br><span class="line">266</span><br><span class="line">267</span><br><span class="line">268</span><br><span class="line">269</span><br><span class="line">270</span><br><span class="line">271</span><br><span class="line">272</span><br><span class="line">273</span><br><span class="line">274</span><br><span class="line">275</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> uitl;</span><br><span class="line"><span class="keyword">import</span> javax.crypto.*;</span><br><span class="line"><span class="keyword">import</span> javax.crypto.spec.SecretKeySpec;</span><br><span class="line"><span class="keyword">import</span> java.io.*;</span><br><span class="line"><span class="keyword">import</span> java.net.URLEncoder;</span><br><span class="line"><span class="keyword">import</span> java.security.InvalidKeyException;</span><br><span class="line"><span class="keyword">import</span> java.security.NoSuchAlgorithmException;</span><br><span class="line"><span class="keyword">import</span> java.security.Security;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 3DES又称Triple DES，是DES加密算法的一种模式，它使用3条56位的密钥对3DES数据进行三次加密。</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">EncrypDES3</span> </span>&#123;</span><br><span class="line">    <span class="comment">// KeyGenerator 提供对称密钥生成器的功能，支持各种算法</span></span><br><span class="line">    <span class="keyword">private</span> KeyGenerator keygen;</span><br><span class="line">    <span class="comment">// SecretKey 负责保存对称密钥</span></span><br><span class="line">    <span class="keyword">private</span> SecretKey deskey;</span><br><span class="line">    <span class="comment">// Cipher负责完成加密或解密工作</span></span><br><span class="line">    <span class="keyword">private</span> Cipher c;</span><br><span class="line">    <span class="comment">// 该字节数组负责保存加密的结果</span></span><br><span class="line">    <span class="comment">//private byte[] cipherByte;</span></span><br><span class="line">    <span class="comment">//保存密钥</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">byte</span>[] keyByte;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 构造方法</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> desKeyString 密钥</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchAlgorithmException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchPaddingException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="title">EncrypDES3</span><span class="params">(String desKeyString)</span> <span class="keyword">throws</span> NoSuchAlgorithmException, NoSuchPaddingException </span>&#123;</span><br><span class="line">        Security.addProvider(<span class="keyword">new</span> com.sun.crypto.provider.SunJCE());</span><br><span class="line">        <span class="comment">// 实例化支持DES算法的密钥生成器(算法名称命名需按规定，否则抛出异常)</span></span><br><span class="line">        keygen = KeyGenerator.getInstance(<span class="string">"DESede"</span>);</span><br><span class="line">        <span class="keyword">if</span> (<span class="string">""</span>.equals(desKeyString)) &#123;</span><br><span class="line">            System.out.println(<span class="string">"密钥是空的"</span>);</span><br><span class="line">            <span class="comment">// 生成密钥</span></span><br><span class="line">            deskey = keygen.generateKey();</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">"密钥不为空"</span>);</span><br><span class="line">            deskey = <span class="keyword">new</span> SecretKeySpec(desKeyString.getBytes(), <span class="string">"DESede"</span>);</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="comment">//保存密钥</span></span><br><span class="line">        keyByte = deskey.getEncoded();</span><br><span class="line">        <span class="comment">// 生成Cipher对象,指定其支持的DES算法</span></span><br><span class="line">        c = Cipher.getInstance(<span class="string">"DESede"</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 对字符串加密</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> str</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> InvalidKeyException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IllegalBlockSizeException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> BadPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">Encrytor</span><span class="params">(String str)</span> <span class="keyword">throws</span> InvalidKeyException,</span></span><br><span class="line"><span class="function">            IllegalBlockSizeException, BadPaddingException, IOException </span>&#123;</span><br><span class="line">        <span class="comment">// 根据密钥，对Cipher对象进行初始化，ENCRYPT_MODE表示加密模式</span></span><br><span class="line">        c.init(Cipher.ENCRYPT_MODE, deskey);</span><br><span class="line">        <span class="comment">// 加密，结果保存进cipherByte</span></span><br><span class="line">        <span class="keyword">byte</span>[] buf = c.doFinal(str.getBytes(<span class="string">"utf-8"</span>));</span><br><span class="line">        String encontent=<span class="keyword">new</span> sun.misc.BASE64Encoder().encode(buf);</span><br><span class="line">        <span class="comment">//保存密钥</span></span><br><span class="line">        <span class="comment">//saveFile("C:\\Users\\Zero\\Desktop\\key.dat", Base64Utils.encode(keyByte));</span></span><br><span class="line">        <span class="keyword">return</span> encontent;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 对字符串解密</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> secretData</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> InvalidKeyException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IllegalBlockSizeException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> BadPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">Decryptor</span><span class="params">(String secretData)</span> <span class="keyword">throws</span> InvalidKeyException,</span></span><br><span class="line"><span class="function">            IllegalBlockSizeException, BadPaddingException, IOException </span>&#123;</span><br><span class="line">        <span class="comment">// 根据密钥，对Cipher对象进行初始化，DECRYPT_MODE表示加密模式</span></span><br><span class="line">        c.init(Cipher.DECRYPT_MODE, deskey);</span><br><span class="line">        <span class="keyword">byte</span>[] buf = c.doFinal(Base64Utils.decode(secretData.toCharArray()));</span><br><span class="line">        String decontent = <span class="keyword">new</span> String(buf);</span><br><span class="line">        <span class="keyword">return</span> decontent;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 加载文件</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> file</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> String <span class="title">loadFile</span><span class="params">(String file)</span> <span class="keyword">throws</span> IOException </span>&#123;</span><br><span class="line">        File f = <span class="keyword">new</span> File(file);</span><br><span class="line">        FileReader fr = <span class="keyword">new</span> FileReader(f);</span><br><span class="line">        BufferedReader bf = <span class="keyword">new</span> BufferedReader(fr);</span><br><span class="line">        StringBuilder msg = <span class="keyword">new</span> StringBuilder();</span><br><span class="line">        String str;</span><br><span class="line">        <span class="keyword">while</span> ((str = bf.readLine()) != <span class="keyword">null</span>) &#123;</span><br><span class="line">            msg.append(str + <span class="string">"\n"</span>);</span><br><span class="line">        &#125;</span><br><span class="line">        msg.deleteCharAt(msg.length() - <span class="number">1</span>);</span><br><span class="line">        bf.close();</span><br><span class="line">        <span class="keyword">return</span> msg.toString();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 保存文件</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> file</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> message</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">saveFile</span><span class="params">(String file, String message)</span> <span class="keyword">throws</span> IOException </span>&#123;</span><br><span class="line">        File f = <span class="keyword">new</span> File(file);</span><br><span class="line">        <span class="keyword">if</span> (!f.exists()) &#123;</span><br><span class="line">            f.createNewFile();</span><br><span class="line">        &#125;</span><br><span class="line">        FileOutputStream fos = <span class="keyword">new</span> FileOutputStream(f);</span><br><span class="line">        fos.write(message.getBytes());</span><br><span class="line">        fos.close();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 加密文本文件</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> sourceFile</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> desFile</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchAlgorithmException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> BadPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IllegalBlockSizeException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> InvalidKeyException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">Encrytor</span><span class="params">(String sourceFile, String desFile)</span> <span class="keyword">throws</span> IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException </span>&#123;</span><br><span class="line">        EncrypDES3 des = <span class="keyword">new</span> EncrypDES3(<span class="keyword">null</span>);</span><br><span class="line">        String msg = loadFile(sourceFile);</span><br><span class="line">        String encontent = des.Encrytor(msg);</span><br><span class="line">        saveFile(desFile, encontent);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 解密文本文件</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> sourceFile</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> desFile</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> keyFile</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> NoSuchAlgorithmException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> BadPaddingException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> IllegalBlockSizeException</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> InvalidKeyException</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">Decryptor</span><span class="params">(String sourceFile, String desFile, String keyFile)</span> <span class="keyword">throws</span> IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException </span>&#123;</span><br><span class="line">        EncrypDES3 des = <span class="keyword">new</span> EncrypDES3(<span class="keyword">null</span>);</span><br><span class="line">        String msg = loadFile(sourceFile);</span><br><span class="line">        String key = loadFile(keyFile);</span><br><span class="line">        String decontent = des.Decryptor(msg);</span><br><span class="line">        saveFile(desFile, decontent);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 测试方法</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> args</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@throws</span> Exception</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">        String KEY = <span class="string">"05WOB22Z9jdrHxLVjGxAL47F"</span>;</span><br><span class="line">        EncrypDES3 des = <span class="keyword">new</span> EncrypDES3(KEY);</span><br><span class="line">        String jsonString  = <span class="string">"&#123;\"name\":\"telphone\",\"param\":\"18520278383\"&#125;"</span>;</span><br><span class="line">        System.out.println(<span class="string">"【源参数】"</span>+jsonString);</span><br><span class="line">        String desString = des.Encrytor(jsonString);</span><br><span class="line">        System.out.println(<span class="string">"【des加密后】"</span>+desString);</span><br><span class="line">        String urlEncoderString = URLEncoder.encode(desString, <span class="string">"utf-8"</span>);</span><br><span class="line">        System.out.println(<span class="string">"【url加密后】"</span>+urlEncoderString);</span><br><span class="line">        System.out.println(<span class="string">"【des解密后】"</span>+des.Decryptor(<span class="string">"AvR7ai1cixdbIiv1ngMwnYbmPhKKbDyi51k4GyL9y+3tqfzd4MeFNm/vwA/AoSIn"</span>));</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">        <span class="comment">//String msg = "&#123;\"name\":\"telphone\",\"param\":\"18520278383\"&#125;";</span></span><br><span class="line">        <span class="comment">//System.out.println("【加密前】：" + msg);</span></span><br><span class="line">        <span class="comment">//EncrypDES3 des = new EncrypDES3("05WOB22Z9jdrHxLVjGxAL47F");</span></span><br><span class="line">        <span class="comment">//System.out.println("【加密后】：" + des.Encrytor(msg));</span></span><br><span class="line">        <span class="comment">//Encrytor("C:\\Users\\Zero\\Desktop\\hint.txt", "C:\\Users\\Zero\\Desktop\\encontent.txt");</span></span><br><span class="line">        <span class="comment">//Decryptor("C:\\Users\\Zero\\Desktop\\encontent.txt", "C:\\Users\\Zero\\Desktop\\decontent.txt", "C:\\Users\\Zero\\Desktop\\key.dat");</span></span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">//=======================================万恶的分割线================================================================</span></span><br><span class="line"><span class="keyword">package</span> uitl;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Base64Utils</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">static</span> <span class="keyword">private</span> <span class="keyword">char</span>[] alphabet = <span class="string">"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="</span>.toCharArray();</span><br><span class="line">    <span class="keyword">static</span> <span class="keyword">private</span> <span class="keyword">byte</span>[] codes = <span class="keyword">new</span> <span class="keyword">byte</span>[<span class="number">256</span>];</span><br><span class="line"></span><br><span class="line">    <span class="keyword">static</span> &#123;</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i &lt; <span class="number">256</span>; i++)</span><br><span class="line">            codes[i] = -<span class="number">1</span>;</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="string">'A'</span>; i &lt;= <span class="string">'Z'</span>; i++)</span><br><span class="line">            codes[i] = (<span class="keyword">byte</span>) (i - <span class="string">'A'</span>);</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="string">'a'</span>; i &lt;= <span class="string">'z'</span>; i++)</span><br><span class="line">            codes[i] = (<span class="keyword">byte</span>) (<span class="number">26</span> + i - <span class="string">'a'</span>);</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="string">'0'</span>; i &lt;= <span class="string">'9'</span>; i++)</span><br><span class="line">            codes[i] = (<span class="keyword">byte</span>) (<span class="number">52</span> + i - <span class="string">'0'</span>);</span><br><span class="line">        codes[<span class="string">'+'</span>] = <span class="number">62</span>;</span><br><span class="line">        codes[<span class="string">'/'</span>] = <span class="number">63</span>;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 将原始数据编码为base64编码</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">static</span> <span class="keyword">public</span> String <span class="title">encode</span><span class="params">(<span class="keyword">byte</span>[] data)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">char</span>[] out = <span class="keyword">new</span> <span class="keyword">char</span>[((data.length + <span class="number">2</span>) / <span class="number">3</span>) * <span class="number">4</span>];</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>, index = <span class="number">0</span>; i &lt; data.length; i += <span class="number">3</span>, index += <span class="number">4</span>) &#123;</span><br><span class="line">            <span class="keyword">boolean</span> quad = <span class="keyword">false</span>;</span><br><span class="line">            <span class="keyword">boolean</span> trip = <span class="keyword">false</span>;</span><br><span class="line">            <span class="keyword">int</span> val = (<span class="number">0xFF</span> &amp; (<span class="keyword">int</span>) data[i]);</span><br><span class="line">            val &lt;&lt;= <span class="number">8</span>;</span><br><span class="line">            <span class="keyword">if</span> ((i + <span class="number">1</span>) &lt; data.length) &#123;</span><br><span class="line">                val |= (<span class="number">0xFF</span> &amp; (<span class="keyword">int</span>) data[i + <span class="number">1</span>]);</span><br><span class="line">                trip = <span class="keyword">true</span>;</span><br><span class="line">            &#125;</span><br><span class="line">            val &lt;&lt;= <span class="number">8</span>;</span><br><span class="line">            <span class="keyword">if</span> ((i + <span class="number">2</span>) &lt; data.length) &#123;</span><br><span class="line">                val |= (<span class="number">0xFF</span> &amp; (<span class="keyword">int</span>) data[i + <span class="number">2</span>]);</span><br><span class="line">                quad = <span class="keyword">true</span>;</span><br><span class="line">            &#125;</span><br><span class="line">            out[index + <span class="number">3</span>] = alphabet[(quad ? (val &amp; <span class="number">0x3F</span>) : <span class="number">64</span>)];</span><br><span class="line">            val &gt;&gt;= <span class="number">6</span>;</span><br><span class="line">            out[index + <span class="number">2</span>] = alphabet[(trip ? (val &amp; <span class="number">0x3F</span>) : <span class="number">64</span>)];</span><br><span class="line">            val &gt;&gt;= <span class="number">6</span>;</span><br><span class="line">            out[index + <span class="number">1</span>] = alphabet[val &amp; <span class="number">0x3F</span>];</span><br><span class="line">            val &gt;&gt;= <span class="number">6</span>;</span><br><span class="line">            out[index + <span class="number">0</span>] = alphabet[val &amp; <span class="number">0x3F</span>];</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">return</span> <span class="keyword">new</span> String(out);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 将base64编码的数据解码成原始数据</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="keyword">static</span> <span class="keyword">public</span> <span class="keyword">byte</span>[] decode(<span class="keyword">char</span>[] data) &#123;</span><br><span class="line">        <span class="keyword">int</span> len = ((data.length + <span class="number">3</span>) / <span class="number">4</span>) * <span class="number">3</span>;</span><br><span class="line">        <span class="keyword">if</span> (data.length &gt; <span class="number">0</span> &amp;&amp; data[data.length - <span class="number">1</span>] == <span class="string">'='</span>)</span><br><span class="line">            --len;</span><br><span class="line">        <span class="keyword">if</span> (data.length &gt; <span class="number">1</span> &amp;&amp; data[data.length - <span class="number">2</span>] == <span class="string">'='</span>)</span><br><span class="line">            --len;</span><br><span class="line">        <span class="keyword">byte</span>[] out = <span class="keyword">new</span> <span class="keyword">byte</span>[len];</span><br><span class="line">        <span class="keyword">int</span> shift = <span class="number">0</span>;</span><br><span class="line">        <span class="keyword">int</span> accum = <span class="number">0</span>;</span><br><span class="line">        <span class="keyword">int</span> index = <span class="number">0</span>;</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> ix = <span class="number">0</span>; ix &lt; data.length; ix++) &#123;</span><br><span class="line">            <span class="keyword">int</span> value = codes[data[ix] &amp; <span class="number">0xFF</span>];</span><br><span class="line">            <span class="keyword">if</span> (value &gt;= <span class="number">0</span>) &#123;</span><br><span class="line">                accum &lt;&lt;= <span class="number">6</span>;</span><br><span class="line">                shift += <span class="number">6</span>;</span><br><span class="line">                accum |= value;</span><br><span class="line">                <span class="keyword">if</span> (shift &gt;= <span class="number">8</span>) &#123;</span><br><span class="line">                    shift -= <span class="number">8</span>;</span><br><span class="line">                    out[index++] = (<span class="keyword">byte</span>) ((accum &gt;&gt; shift) &amp; <span class="number">0xff</span>);</span><br><span class="line">                &#125;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (index != out.length)</span><br><span class="line">            <span class="keyword">throw</span> <span class="keyword">new</span> Error(<span class="string">"miscalculated data length!"</span>);</span><br><span class="line">        <span class="keyword">return</span> out;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p><a href="https://github.com/cnsyear/tools/tree/master/%E7%AE%97%E6%B3%95/3desc" target="_blank" rel="noopener">源码地址</a></p>
<p>参考链接：</p>
<p><a href="https://blog.csdn.net/yinhuaiya/article/details/52382741" target="_blank" rel="noopener">https://blog.csdn.net/yinhuaiya/article/details/52382741</a></p>

      
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        <div style="text-align:center;color:#ccc;font-size:14px">-------------已经触及底线 <i class="fa fa-paw"></i> 感谢您的阅读-------------</div>
    
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<div class="my_post_copyright">
  <p><span>本文标题:</span>3DES加密算法-预登记接口</p>
  <p><span>文章作者:</span>趙小傑~～</p>
  <p><span>发布时间:</span>2018年03月13日 - 16:35:08</p>
  <p><span>最后更新:</span>2019年07月13日 - 16:37:39</p>
  <p><span>原始链接:</span><a href="/2018/03/13/3DES加密算法-预登记接口/" title="3DES加密算法-预登记接口">https://cnsyear.com/2018/03/13/3DES加密算法-预登记接口/</a>
    <span class="copy-path" title="点击复制文章链接"><i class="fa fa-clipboard" data-clipboard-text="https://cnsyear.com/2018/03/13/3DES加密算法-预登记接口/" aria-label="复制成功！"></i></span>
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  <p><span>许可协议:</span><i class="fa fa-creative-commons"></i> <a rel="license" href="https://creativecommons.org/licenses/by-nc-nd/4.0/" target="_blank" title="Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)">署名-非商业性使用-禁止演绎 4.0 国际</a> 转载请保留原文链接及作者。</p>  
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                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
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